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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b05d1c7943a1b828f5d9c453ebedfb8273254c6600911001fdabb930a427b31' 
  AND token = '6x5RhCAb+3Blu8Vz3dCGeVw4Ik8jMz6e1/KNS959u9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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