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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d926965ad22afb245c9f8dc672a695c0f564986bbc9f79916c6c2fbd93d6a0e' 
  AND token = 'TN1GI1Gp6FhtqyTU6/KgPpwsWkVYXeQHNVHyaoidqmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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