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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '605a9458c40daa5e88338d1f5a00928d11352a0a4ff0baea2f17693006138145' 
  AND token = '4MF4rKirHaXtWTk6nf0OGF/IhAdlM6Rk0MVy2uW7UR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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