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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7fc39ecc64603e1f0b75309eb23f7fb07aa3d33164ef61c657a274f27fd59c7' 
  AND token = 'VpZiCI8E1qdYz+MRrtvUj2Sp1h76y04AZFtM31UIDRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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