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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd07fcdc25c57f6083e2f2cf105e4b6510c9de7d84d25506cd093a687536895cc' 
  AND token = '3Qhc4EVr2Mq47O0uGc5yEImdcQyiagSfqB80f5YGabY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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