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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95fdae680addbebdc0166c553a7a23a2ec52540d38288eae7a66597d7e12abc6' 
  AND token = 'go4oqiMnRvvg4sKEO8cqJ2VMpKbVRCQCE80Qx3sd/oU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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