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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09c415e0f823e55bbc6f6792cfdd4442330ef33882f83ea1f0081c78a07584e0' 
  AND token = 'Idprw5g4Auy3YB9+TjWKRoj1T5y4B6ULBoCc4Vf2Fwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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