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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74b47b72fbca51a7b8b88f3e551f2f435217a263398b8a2f8084cb25dd8245cc' 
  AND token = 'BGl5H0r4HZNRATgN1Hdv5jhtXPXxxWYI5yuvHr1ksqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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