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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4585b4c07b0b46fcaec22bd9d8d45261898344f2dcb7837ce894e017191d028' 
  AND token = 'w9/6zTMn9QQGk+7nis+scXI5w/lIQwAyWNOam3Sy2zE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00079

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}