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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '954a272631e395a8eb6a720a919869c2fc046be764ed61754cfb3858ece7b9ea' 
  AND token = 'OPA/mWAZZ9HVQlYvUMioj1pOxO8CF6Cl1FZfCbVihiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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