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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e2a4bd9dd99fd829dd26706cbb7625f8d1a0cf55ef37c76cb87d5560c4e2f7a2' 
  AND token = 'cPHEc6d89DLs5RSBQ5YvIbro3SGwW6xWxs38iDswGiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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