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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f2a0e181a6b2d5c8729f33078e6aec173db6ff5aec534dd87aca389848ebf98' 
  AND token = 'dj1UozsZFq0m/5YsB+ZwZaIJ3H3ZnoeLt7ad0raBHYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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