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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '955236a86a18ba5390e86b8ec0e3b0735605757b2e27e6cf4aa8ae6e4f582413' 
  AND token = 'iS46IW4Hy9dLJF27HuF2/KdxSDbnH/JE28EU/3kJLcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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